EP 0499065 B1 19970528 - Optical transmission system for the subscriber connection area with optical amplifiers
Title (en)
Optical transmission system for the subscriber connection area with optical amplifiers
Title (de)
Optisches Nachrichtenübertragungssystem für den Teilnehmeranschlussbereich mit optischen Verstärkern
Title (fr)
Système de transmission optique pour zone d'abonnés utilisant des amplificateurs optiques
Publication
Application
Priority
- DE 4104084 A 19910211
- DE 4116660 A 19910522
Abstract (en)
[origin: EP0499065A2] The system according to the invention serves to distribute communication signals, in particular television signals, from a central station to a multiplicity of subscribers and to enable two-way transmission of telephone and data signals between the central station and the subscribers. According to the invention, the network used for this purpose is an optical waveguide network with a star-star structure in which fibre-optic amplifiers (10, 11) are provided between successive branching points. The communication signals to be distributed are transmitted via the optical waveguide network on a first wavelength ( lambda 1) to the subscribers, the subscriber-individual communication signals to be transmitted from the central station (1) to the subscribers (Ti) are converted by frequency modulation to a frequency band (FB2) which differs from that of the distribution signals (by frequency modulation) and are transmitted on the same wavelength as that of the distribution signals to the subscribers, and the subscriber-individual signals to be transmitted from the subscribers (Ti) to the central station (1) are converted by frequency modulation to a further frequency band (FB3) and transmitted optically on a second wavelength ( lambda 2) to the central station. This optical signal is amplified at suitable points (A), and a plurality of alternative embodiments for this amplification are indicated. <IMAGE>
IPC 1-7
IPC 8 full level
H04J 14/00 (2006.01); H04B 10/20 (2006.01); H04B 10/27 (2013.01); H04B 10/272 (2013.01); H04B 10/29 (2013.01); H04B 10/291 (2013.01); H04B 10/548 (2013.01); H04J 14/02 (2006.01); H04M 3/00 (2006.01); H04N 7/16 (2011.01); H04N 7/22 (2006.01); H04N 21/647 (2011.01)
CPC (source: EP US)
H04B 10/27 (2013.01 - EP US); H04B 10/272 (2013.01 - EP US); H04B 10/2912 (2013.01 - EP US); H04B 10/2972 (2013.01 - EP US); H04J 14/0232 (2013.01 - EP US); H04J 14/0247 (2013.01 - EP US); H04J 14/0252 (2013.01 - EP US); H04J 14/0226 (2013.01 - EP US); H04J 14/0282 (2013.01 - EP US); H04J 14/0298 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0499065 A2 19920819; EP 0499065 A3 19930922; EP 0499065 B1 19970528; AT E153812 T1 19970615; AU 1087492 A 19920813; AU 649102 B2 19940512; CA 2061041 A1 19920812; CA 2061041 C 19990406; DE 59208529 D1 19970703; ES 2104740 T3 19971016; JP 3169665 B2 20010528; JP H0563659 A 19930312; NZ 241581 A 19950224; US 5337175 A 19940809
DOCDB simple family (application)
EP 92101057 A 19920123; AT 92101057 T 19920123; AU 1087492 A 19920210; CA 2061041 A 19920211; DE 59208529 T 19920123; ES 92101057 T 19920123; JP 2545792 A 19920212; NZ 24158192 A 19920211; US 83393592 A 19920211